| Customization: | Available |
|---|---|
| CAS No.: | 7772-98-7 |
| Formula: | Na2s203.5H2O |
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| ITEMS | UNIT | QUALITY STANDARD | RESULTS |
| Sodium Thiosulfate Content (Mass Fraction as Na2S2O3·5H2O) | % | ≥98.0 | 98.23 |
| Ferric Content(Mass Fraction as Fe) | % | ≤0.002 | 0.001 |
| Water Insoluble Substance (Mass Fraction) | % | ≤0.01 | 0.002 |
| Sulfide Content (Mass Fraction as Na2S) |
% | ≤0.001 | 0.0008 |
| Sodium Chloride Content (Mass Fraction Basis for NaCl ) | % | ≤0.05 | 0.04 |
| PH Value(200g/L solution) | - | 6.5-9.5 | 8.0 |
| Appearance | Transparent crystalline particles | ||
| Conclusion | Qualified | ||
| Insepector: Fu yanyan Checker: Song yuehua | |||
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Storage environment: IT should be stored in a dry, cool, well ventilated indoor environment, avoiding direct sunlight and high temperatures. The storage temperature should be controlled below 25 ºC, and the relative humidity should not exceed 75%
1.In the field of photography, it is used as a fixative in traditional photography to remove non photosensitive silver halides.
2.Water treatment: used to treat residual in industrial wastewater and achieve dechlorination; It can also be used to treat heavy metal ions.
3. Paper and textile: Used as a bleaching agent, stabilizer, or reducing agent to improve the performance of paper and textiles.
4. Chemical industry:Used as a reducing agent in chemical reactions to regulate the reaction environment.
Used for manufacturing other sulfide and thio salt compounds.
5. Mining and Metallurgy:The process used to extract precious metals such as gold and silver from ores.
6. Other uses:Used in the laboratory for iodometric titration as a reducing agent.
Used in the medical industry for the preparation of certain drugs (industrial grade must meet other processing standards).
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